These behaviours, known as fixed-action patterns, have several salient characteristics: they are specific to the species under study, occur in a highly similar fashion from one occurrence to the next, and do not appear to be appreciably altered by experience. Furthermore, the stimulus that releases these genetically programmed behaviours…

…(Instinkthandlung), “endogenous movements,” and “fixed action patterns” but maintained that it and it alone possessed all the attributes of instinct. Thus, it was supposed to be (1) stereotyped, (2) possessed by all members of at least one sex of a species, (3) innate in the sense of being genetically…